The FCC has allocated 219-220 MHz to amateur
use on a secondary basis. This allocation is only for fixed digital
message forwarding systems operated by all licensees except Novices.
Amateur operations must not cause interference to, and must accept
interference from, primary services in this and adjacent bands. Amateur
stations are limited to 50 W PEP output and 100 kHz bandwidth. Automated
Maritime Telecommunications Systems (AMTS) stations are the primary
occupants in this band. Amateur stations within 398 miles of an AMTS
station must notify the station in writing at least 30 days prior to
beginning operations. Amateur stations within 50 miles of an AMTS station
must get permission in writing from the AMTS station before beginning
operations. ARRL Headquarters maintains a database of AMTS stations. The
FCC requires that amateur operators provide written notification including
the station's geographic location to the ARRL for inclusion in a database
at least 30 days before beginning operations. See Section 97.303(e) of the
FCC Rules.Novice (Novices
are limited to 25 watts PEP output),

* Amateur operation at 76-77 GHz has been suspended till the FCC can
determine that interference will not be caused to vehicle radar
systems

US Amateur Transmitter Power
Limits

At all times, transmitter power must be
the minimum necessary to carry out the desired communications. Novice/Technicians are limited to 200 watts PEP on HF
bands.Geographical power restrictions apply to the 70 cm, 33
cm and 23 cm bands; see The FCC Part
97for details.